19782464880 has 160 divisors (see below), whose sum is σ = 61996032000. Its totient is φ = 5217924096.

The previous prime is 19782464873. The next prime is 19782464909. The reversal of 19782464880 is 8846428791.

It is a self number, because there is not a number n which added to its sum of digits gives 19782464880.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12770346 + ... + 12771894.

It is an arithmetic number, because the mean of its divisors is an integer number (387475200).

Almost surely, 2^19782464880 is an apocalyptic number.

19782464880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19782464880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30998016000).

19782464880 is an abundant number, since it is smaller than the sum of its proper divisors (42213567120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19782464880 is a wasteful number, since it uses less digits than its factorization.

19782464880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111 (or 2105 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 57.

The spelling of 19782464880 in words is "nineteen billion, seven hundred eighty-two million, four hundred sixty-four thousand, eight hundred eighty".